Novel Cross-Type Network for Wide-Tuning-Range Reconfigurable Multiband Antennas

International Journal of Antennas and Propagation. 2014;2014 DOI 10.1155/2014/741960

 

Journal Homepage

Journal Title: International Journal of Antennas and Propagation

ISSN: 1687-5869 (Print); 1687-5877 (Online)

Publisher: Hindawi Publishing Corporation

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering

Country of publisher: Egypt

Language of fulltext: English

Full-text formats available: PDF, HTML, ePUB, XML

 

AUTHORS

Chieh-Sen Lee (Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan)
Chi-Lin Tsai (Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan)
Chin-Lung Yang (Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 24 weeks

 

Abstract | Full Text

This paper presents a cross-type network design with a novel reconfigurable functionality to realize a tunable multiband antenna. By attaching a reconfigurable network at the feeding port of a broadband antenna, multi-input impedance adjustment enables the production of multimatching operating bands. Each band can be independently controlled by a single component with a considerably wide tuning range and high selectivity. The experiments in this study involved using an ultra-wideband (UWB) antenna connected to the proposed cross-type network. The tunable antenna operates in a dual band of fL (1.39 to 2.34 GHz) and fH (2.1 to 3.6 GHz) with tunable frequency ratios of 168% and 132%, respectively. The average bandwidths at fL and fH are approximately 50 MHz and 148 MHz, respectively, implying narrowband operation. The measured radiation pattern revealed that the tunable antenna exhibits a nearly omnidirectional radiation pattern at both 1.8 and 3.5 GHz. The network circuit architecture can be extended to the multiband function type by adopting this matching approach. The amount of shunt matches determines the number of operation bands.